OEM IBM Lenovo Thinkpad T61 44C3933 Laptop Motherboard | eBay
Lenovo 43Y9252 Thinkpad Notebook R400 System Board Motherboa
Motherboard MLB31-7 for Lenovo THINKPAD T61
42X6806 IBM Lenovo System Board (Motherboard) for ThinkPad T61 T61p (Refurbished)
T61: Another dead motherboard or is there any hope? - Thinkpads Forum
T700 crowdfunding: a new custom motherboard for good old T60/T61 Thinkpads - with 11th gen Intel and up to 64GB of DDR4 - has a great chance of coreboot opensource firmware support
Lenovo 43Y9252 Thinkpad Notebook R400 System Board Motherboa